Place whole potatoes (do not poke) into microwave-safe covered dish.
Microwave on high for 3 to 4 minutes.
While potatoes are cooking, cut mini peppers into small 1/4-inch slices. Spray a nonstick pan with cooking spray and heat to medium. Add peppers and sauté until they start to brown. Remove from pan and set aside.
Remove potatoes from microwave and using a layer of paper towels covering each potato, smash it on a cutting board until 1 3/4-inch thick. Spray sauté pan with cooking spray, heat on high and add smashed potatoes. Cook for 1 to 2 minutes until potatoes start to brown.On a plate, place potatoes and layer with sour cream or yogurt (optional), peppers and cilantro. Dust with salt, chili powder and pepper to taste. Serve warm.