"This simple casserole has quite a bit of Mexican heat from green chilies and red pepper flakes...."
INGREDIENTS
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1 Tbs. butter
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1 C. onion, chopped
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9 oz. green chilies, canned, drained
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6 oz. grated cheddar cheese
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6 oz. Monterey jack cheese, grated
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3 large eggs
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3/4 C. sour cream
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1/4 tsp. red pepper flakes
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1 C. chopped tomatoes, seeded