Lightly spray four oven-safe dishes or ramekins with cooking spray.
Heat a large skillet over medium-low heat, add olive oil and diced shallots and cook for 2 to 3 minutes.
Add baby spinach, salt, and freshly ground pepper and cook until the spinach wilts, about 2 to 3 minutes.
Mix in Asiago cheese and remove from heat.
Divide the wilted spinach mixture among the oven-safe dishes, making a well in the center of each.
Break an egg into each dish and season with salt and freshly ground pepper.
Place the ramekins on rimmed baking sheets and bake until the whites are set and the yolks are firm around the edges but still soft in the center, about 17 minutes.
Serve immediately.
Notes
This baked eggs recipe is a great low-carb, keto-friendly breakfast option packed with vitamins and minerals from spinach and cheese.