Heat oven to 325°F and set twelve greased silicone muffin cups on a rimmed sheet pan.
Wash, dry and chop spinach; finely dice pepper and slice green onions.
Blend eggs, cottage cheese, salt, pepper and garlic for 20 to 30 seconds until smooth; rest 3 minutes.
Divide vegetables and 1/2 cup cheddar evenly among the cups.
Pour the blended mixture to fill cups three-quarters full and stir each once to distribute.
Sprinkle with remaining 1/4 cup cheddar.
Bake 22 to 28 minutes until barely firm and 160°F in the center.
Rest 5 minutes, release with a flexible spatula and move to a rack.