Tamale Hash

4 tablespoons butter
3 tablespoons vegetable oil
1 medium onion, chopped
8 tamales, any variety, cut into bite-size chunks
4 eggs
Red or green chile sauce, warmed
Tomatoes and scallions, chopped
Crema or sour cream
Cheddar cheese, grated

In a heavy skillet, warm butter and oil over medium heat. If the tamales are fairly dry, use about a tablespoon more of oil. Add onion and saut