Preheat the oven to 425 degrees F.
Trim the ends of the onions, leaving the skins on, and cut them in half horizontally. Put the onions, cut-side up, in a baking dish just large enough to hold them in a single layer. Drizzle with 3 tablespoons of the oil; scatter the thyme sprigs over the top and season with salt and pepper. Add 2 cups of water, cover with foil, and bake for 1 hour. Remove the foil and bake, basting with the pan juices until the edges of the onions are browned, about 45 minutes to 1 hour more. (Add more water if pan is running dry.) Remove from the oven and cool.
Smash the garlic clove with the side of a cook's knife. In a large skillet, heat 2 tablespoons of the oil over medium heat, add the garlic and stir until golden, about 3 minutes. Remove the garlic and discard. Working in batches, add the spinach, stirring to wilt before each addition. When all the spinach has been added, raise the heat to high, season with salt and pepper, and stir to combine. Cover and cook until fully wilted, about 3 minutes. Remove from the heat and drain the spinach in a colander. When cool enough to handle, squeeze as much liquid from the spinach as possible and coarsely chop.
Lower the oven heat to 350 degrees F.
Scoop out the center of each onion, leaving at least half an inch of the outer rings, to make onion bowls . Coarsely chop half of the onion centers, and reserve the remaining for another use. In a mixing bowl combine the chopped onion, spinach, lemon zest, eggs, cayenne, breadcrumbs, chopped thyme, and feta cheese. Season with salt and pepper. Divide the mixture evenly among the scooped-out onions. Drizzle the tops with the remaining olive oil and bake for 30 minutes. Serve hot or at room temperature.

Kitchen-Friendly View

Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	449.29 Kcal (1881 kJ)
Calories from fat	167.53 Kcal
		% Daily Value*
Total Fat	18.61g	29%
Cholesterol	59.12mg	20%
Sodium	207.05mg	9%
Potassium	371.68mg	8%
Total Carbs	56.02g	19%
Sugars	4.41g	18%
Dietary Fiber	7.88g	32%
Protein	14.04g	28%
Vitamin C	0.5mg	1%
Iron	1.9mg	10%
Calcium	119.7mg	12%

Amount Per 100 g
Calories	267.17 Kcal (1119 kJ)
Calories from fat	99.62 Kcal
		% Daily Value*
Total Fat	11.07g	29%
Cholesterol	35.15mg	20%
Sodium	123.12mg	9%
Potassium	221.02mg	8%
Total Carbs	33.31g	19%
Sugars	2.62g	18%
Dietary Fiber	4.69g	32%
Protein	8.35g	28%
Vitamin C	0.3mg	1%
Iron	1.1mg	10%
Calcium	71.2mg	12%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

Search recipes
by ingredients

Construct & Analyze
Your Recipe

Analyze

Try this similar recipes

Pasta Sauce With Turkey Meatballs

Extra virgin olive oil, Diced onion, Kosher salt and 23 more..
Barefoot Contessa's Greek Panzanella

Extra virgin olive oil and 16 more..
Healthy Greek Pizza

Extra virgin olive oil, Red onion, thinly sliced and 11 more..
Feta Spread

Feta cheese, crumbled, Cream cheese, at room temp and 9 more..
Three-Greens Soup with Spinach Gremolata

Extra-virgin olive oil, divided and 11 more..
Linguine with Fava Greens, Shrimp, and Green Garlic

Qts. lightly packed fava greens*, rinsed and spun dry and 9 more..
Roasted Sweet Potatoes and Broccolini

Extra-virgin olive oil, Chopped fresh thyme, Kosher salt and 6 more..
Spinach Feta Bake

Frozen spinach (thawed and squeezed dry ) and 7 more..
Lancer's Spinach Salad

Garlic clove, crushed, Fresh spinach, washed and dried and 9 more..

Recipe Tags

Weightwatchers Points

9.7

Points
12

PointsPlus

Good Points

saturated fat free,
low sodium,
good source of fiber

Also Try

Baked Stuffed Onions

Yellow onions, Fresh breadcrumb, Grated parmesan cheese and 5 more..
Sesame Rings Spain From Food Network Kitchens

Sesame rings (spain) from food network kitchens and 13 more..
Olive Garden Salad Dressing - Food Network Kitchen's Copycat

Extra virgin olive oil, White wine vinegar, Miracle whip and 5 more..
Peter's Baked Stuffed Onions

Uncooked white rice, Vidalia onions and 8 more..
Baked Stuffed Sweet Onions

Sweet onions, Coarse salt, plus more for cooking water and 7 more..
Baked Stuffed Vidalia Onions

Uncooked white rice, Vidalia onions and 8 more..
Food Network Thai Chicken Soup

Vegetable oil, Onion, thinly sliced, Garlic cloves, minced and 9 more..
Baked Stuffed Shrimp with Crabmeat Stuffing

Fresh lump crabmeat, shells removed (or 2 cans of canned ... and 17 more..
Stuffed Onions
Stuffed Onions (Crock Pot)

Onions, peeled, Chopped cooked ham and 6 more..