Southwestern Au Gratin Potatoes

Name: Southwestern Au Gratin Potatoes
Prep time: 30 min
Cook time: 50 min
Total time: 1 h 20 min
Cuisine: American, Southern
Ingredients: 2 Tbsp unsalted butter; 1 small yellow onion (thinly sliced); 1 medium jalapeno (thinly sliced); 2 Tbsp all-purpose flour; 3 cloves garlic (minced); 2 1/4 C heavy cream; 1/2 Tsp hot chili powder (optional); 1/4 Tsp ground cumin; 1/4 Tsp dried oregano; 1 1/2 Tsp seasoned salt (to taste); 2 C smoked pepper jack (shredded); 2 C medium cheddar cheese (shredded); 2 lbs Yukon gold potatoes (thinly sliced); 1/4 Tsp cayenne pepper