Preheat the oven to 400 degrees F. and spray the cups of a 6 cup muffin tin with cooking spray
Fit a half-slice of prosciutto into each mini muffin cup leaving some above the pan edge.
Heat olive oil in a medium skillet and cook the garlic over medium heat about 30 seconds. Add the spinach and sauté stirring continuously until the spinach wilts about 2 to 3 minutes. Remove from the heat and let cool slightly.
In a medium bowl, scramble the eggs, add mascarpone cheese, salt, and pepper. Beat very well
Divide the sautéed spinach among the prosciutto cups and pour egg mixture carefully over the spinach