Put oven rack in middle position and preheat oven to 375°F. Grease pan with 2 teaspoons oil and wrap outside with foil.
Cook chard in a 5- to 6-quart pot of boiling salted water, uncovered, until just tender, about 3 minutes. Transfer with a slotted spoon to a sieve set over a bowl. Reserve cooking water in pot. Press hard on chard to extract as much water as possible, then transfer to a cutting board and chop.
Cook onion in 3 tablespoons oil in a 12-inch heavy skillet over moderate heat, stirring occasionally, until softened and golden brown, about 15 minutes. Add garlic and cook, stirring, 1 minute. Stir in chard, 1/2 teaspoon salt, and 1/4 teaspoon pepper and remove from heat. Cool chard mixture to warm.
While chard cools, return cooking water to a boil and cook fettuccine, uncovered, until al dente. Drain pasta in a colander, then transfer to a large bowl and toss with remaining teaspoon oil. Blend together eggs, milk, mascarpone, and remaining 3/4 teaspoon salt and 1/4 teaspoon pepper in a blender until smooth.
Stir chard and Fontina into pasta mixture, then stir in egg mixture. Pour into greased springform pan set in a large shallow baking pan (to catch any drips). Pat down chard to make surface even if necessary.
Bake until just set and top is golden brown, 50 minutes to 1 hour. Cool in springform pan on a rack 10 minutes, then run a small sharp knife around inside edge of pan to loosen torte. Remove side of pan and serve torte hot or warm.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	411.05 Kcal (1721 kJ)
Calories from fat	249.64 Kcal
		% Daily Value*
Total Fat	27.74g	43%
Cholesterol	248.94mg	83%
Sodium	926.46mg	39%
Potassium	596.97mg	13%
Total Carbs	21.24g	7%
Sugars	4.42g	18%
Dietary Fiber	3.26g	13%
Protein	19.92g	40%
Vitamin C	35.6mg	59%
Iron	3.7mg	21%
Calcium	309.8mg	31%

Amount Per 100 g
Calories	145.86 Kcal (611 kJ)
Calories from fat	88.59 Kcal
		% Daily Value*
Total Fat	9.84g	43%
Cholesterol	88.34mg	83%
Sodium	328.75mg	39%
Potassium	211.84mg	13%
Total Carbs	7.54g	7%
Sugars	1.57g	18%
Dietary Fiber	1.16g	13%
Protein	7.07g	40%
Vitamin C	12.6mg	59%
Iron	1.3mg	21%
Calcium	109.9mg	31%

* 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

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