Directions:
- Preheat oven to 400 deg F/200 deg Celsius Have ready a tart plate or dish, not too large.
- Peel the onions and cut into thickish rounds, about 1/4 inch thick. It's not too important, but the rounds should not be too thick to soften properly.
- Heat the olive oil in a pan to quite a high heat. Add the onions. They'll break apart - no worries. Let them fry over high heat for a few minutes. Then sprinkle over the balsamic vinegar, and top with the brown sugar. (Any brown sugar will do).
- Before you turn down the heat, turn over the onions once. Then lower heat, put on a lid, and let stew slowly for about 15 - 20 minutes. If, after that time, you find some liquid in the pan, remove the lid, turn up the heat, and let the onions simmer until the liquid goes gooey.
- Add the mushrooms, stir in, and let fry for about 5 minutes. (You can also use a can of whole mushrooms, of about 15 - 16 oz. Drained, that will yield about 7 - 8 oz as well). Add the walnuts, stir through.
- Sprinkle very lightly with sea salt (the blue cheese is also salty). Stir in the walnuts, and pull off the heat.
- Roll out the pastry, and cut out a round about 1 inch (2 cm) larger than the top of the tart plate or dish. Beat the egg.
- Line the bottom of a tart plate or tin (not loose-bottomed) with a round of baking paper. Tip in the contents of the pan, with all juices, into the bottom of the tart plate. Crumble the blue cheese on top.
- Cover the top of this lot with the pastry lid , and tuck in the edges. Paint the pastry with the egg, to firm the pastry and get a golden colour.
- Bake for about 40 minutes, or until the pastry is golden brown.
- Cool for 5 minutes, then up-end a plate over the tarte tatin, turn over, and it should easily slide out. Remove the baking paper round.
- Cut into wedges to serve. It can wait for a while in a warming oven, but not too long, as the pastry can go soft, which you don't want.
Nutrition Facts
| Amount Per 1 Serving | |||
| Calories | 439.19 Kcal (1839 kJ) | ||
| Calories from fat | 313.22 Kcal | ||
| % Daily Value* | |||
| Total Fat | 34.8g | 54% | |
|---|---|---|---|
| Cholesterol | 39.68mg | 13% | |
| Sodium | 354.33mg | 15% | |
| Potassium | 174.84mg | 4% | |
| Total Carbs | 23.13g | 8% | |
| Sugars | 4.02g | 16% | |
| Dietary Fiber | 1.93g | 8% | |
| Protein | 9.64g | 19% | |
| Vitamin C | 2mg | 3% | |
| Iron | 1.7mg | 9% | |
| Calcium | 109.5mg | 11% | |
| Amount Per 100 g | |||
| Calories | 384.93 Kcal (1612 kJ) | ||
| Calories from fat | 274.52 Kcal | ||
| % Daily Value* | |||
| Total Fat | 30.5g | 54% | |
|---|---|---|---|
| Cholesterol | 34.78mg | 13% | |
| Sodium | 310.55mg | 15% | |
| Potassium | 153.24mg | 4% | |
| Total Carbs | 20.28g | 8% | |
| Sugars | 3.53g | 16% | |
| Dietary Fiber | 1.7g | 8% | |
| Protein | 8.45g | 19% | |
| Vitamin C | 1.7mg | 3% | |
| Iron | 1.4mg | 9% | |
| Calcium | 96mg | 11% | |
* 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.
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