How to Make a Spinach Frittata

Sauté the shallot and spinach. Heat 2 tablespoons olive oil in a 10-inch cast iron or oven-safe nonstick skillet over medium heat until shimmering. Add the shallot and sauté until softened, about 3 minutes. Add 5 ounces baby spinach a handful at a time, and sauté until just wilted, about 2 minutes.

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