Scrub potatoes; dry and pierce with fork. Bake in 425°F. 45 to 60 minutes, or until tender.
Saute peppers and onions in olive oil in a large skillet over medium heat for 4-5 minutes, or until soft. Season with salt and pepper to taste.
To serve: Blossom each potato with a fork. Top each with 2 Tablespoons yogurt and 1/3 cup cheese. Broil until cheese is melted. Top each with 1/4 cup red pepper mixture, and garnish with 1 teaspoon green onion.