Kale, Caramelized Onion, and Gouda Egg Muffins
From Nicole Perry, POPSUGAR Food
Notes
If you have already-caramelized onions, substitute a heaping 1/2 cup. Once cooled, store the muffins in an airtight container; they can be refrigerated for up to a week, or frozen for up to a month. Reheat for a few minutes in a 350ºF oven or toaster oven until warmed through (if frozen, thaw overnight in the fridge before reheating).
Ingredients
- 1 tablespoon plus 1 teaspoon extra-virgin olive oil, divided, plus more for greasing the muffin tin
2 medium yellow onions, thinly sliced into half-moons
Kosher salt
1/2 teaspoon balsamic vinegar
1 large bunch lacinato kale, stemmed and cut into 1/2-inch-wide ribbons
1 cup grated aged gouda, divided
8 large eggs
Directions
- Preheat the oven to 375°F. Grease a 12-cup standard muffin tin with olive oil.
- In a large skillet, heat 1 teaspoon olive oil over medium-high until just shimmering. Add the onions and 1/2 a teaspoon salt, stirring to evenly coat the onions with oil. Keep cooking, stirring the onions occasionally and adjusting the heat (if necessary) to accommodate slow, even browning. As the onions cook, scrape up any brown bits that begin to form on the bottom of the skillet. (Add a splash of water to deglaze, from time to time.) Keep cooking until the onions are slumped, have dramatically shrunk in volume, and are deep-caramel brown. Season with about 1/2 teaspoon balsamic vinegar, and transfer to a medium mixing bowl.
- Wipe out the skillet, and heat the remaining 1 tablespoon olive oil over medium-high heat until shimmering, but not smoking. Add the kale, a generous pinch of salt, and cook, stirring occasionally, until bright green and somewhat wilted, 2-3 minutes. Add the kale to the caramelized onions. Cool for 10 minutes, then add 3/4 cup gouda, tossing everything together with tongs to evenly distribute the filling ingredients.
- Divide the caramelized onions, kale, and cheese between the muffin tin wells.
- Whisk together the eggs and 1/2 teaspoon salt in a measuring cup, until no streaks of yolk remain. Carefully pour the egg mixture into the muffin tin wells, filling each well about 3/4 full. Sprinkle the remaining 1/4 cup gouda on top of the muffins.
- Bake for 18-22 minutes, rotating halfway through, or until puffy, cooked through, and golden on top.
- Cool for 2-3 minutes, then remove from the muffin tin (run a butter knife around the muffin if it's stubborn). Serve hot or at room temperature.
Information
- Category
- Eggs, Breakfast/Brunch
- Cuisine
- North American
- Yield
- 12 egg muffins; about 6 servings
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