1 1/4 lb ground beef
2-3 roasted Hatch chiles, peeled, seeded and chopped
1 tbsp butter
1/4 large sweet onion, diced
2 cloves garlic, minced
3/4 cup ketchup
1/2 cup water
1 tbsp brown sugar
1 tsp ancho chili powder, or to taste
1/2 tsp dry mustard
1/2 tsp red pepper flakes, or to taste
1 1/2 tbsp tomato paste
4 jalapeño chilies, seeded and chopped
Worcestershire sauce, to taste
Hot sauce, to taste
Salt and pepper