In a large bowl, mix together the ground sirloin, chili powder, cumin, coriander, Worcestershire and grill seasoning.
Score the meat into 4 and form 2 thin patties out of each section, creating 8 patties. Place a large skillet or griddle top over medium-high heat with 1 turn of the pan of EVOO. Cook patties until brown and cooked through, about 2 minutes on each side (if using a skillet, you'll have to work in batches). When you flip the burgers, place a slice of cheese on the cooked side so it can melt while the other side cooks.
While the burgers are cooking, mix together the ketchup, diced chilies, and sour cream in a small bowl. Set aside until ready to assemble.