In a large skillet, cook bacon until crisp. Remove to a paper towel to drain; reserve drippings in skillet. Combine flour and half of the garlic salt, onion salt and pepper. Cut liver into 2x1/2-in. strips; dredge in the flour mixture, coating well. Lightly brown liver in drippings. Add potatoes and onion. Sprinkle with remaining seasonings; cook until the potatoes are browned and tender, stirring occasionally. Crumble bacon over top. Garnish with green pepper rings if desired.