In a large nonstick skillet over medium-high heat, melt margarine. Add sausage, peppers and onions; salt and pepper to taste. Continue sautéing until peppers are softened and all liquid has evaporated.
Pour eggs into skillet. Allow eggs to begin setting; slowly pull spatula across egg mixture, allowing uncooked eggs to run under cooked eggs.
Stir in cheese when eggs are about half done. Continue cooking and stirring, allowing eggs to set. Serve immediately.
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