In saute pan heat olive oil over medium heat. Add onion, sprinkle with salt and cook until tender.
Add butter to pan and melt. Add shrimp to pan. Cook until shrimp turn pink and are cooked through and water evaporates 3 - 5 minutes. Add red pepper, stir.
Add hot spaghetti rice to pan and toss. Serve with a great crusty bread and perhaps a glass of Pino Grigio