Texas Sweet Onion Casserole

texas sweet onion casserole
The moment I saw this on Homesick Texan I was dying to try it! Luckily I had an excuse to make a big, yummy dish like this and went on a search to find something else to go with it. I settled on trying a Santa Fe Spice Rub (recipe to come) and grilled chicken. We made tacos out of the chicken and some sauteed peppers, along with guacamole and then had this cheesy, delicious rice on the side. It was a heavenly meal!!!

2 tablespoons unsalted butter
2 large Texas sweet 1015 onions, peeled and chopped (about 2 pounds)
3 cups cooked rice
1/4 teaspoon ground cumin
1/4 teaspoon ground allspice
Pinch of cayenne
2 cloves garlic
1 or 2 chipotle chiles en adobo, diced (depending on how hot you want it)
2 cups sour cream
2 cups shredded Gruyere (8 ounces), divided
Salt to taste
Chopped cilantro for garnish (optional)

Preheat the oven to 350 degrees.
In a large ovenproof skillet, preferably cast iron, on low heat melt the butter. Add the chopped onion and while occasionally stirring cook for 10 minutes until soft.
Meanwhile, stir together the cooked rice, cumin, allspice, cayenne, garlic, chipotle chile, sour cream and 1/2 cup of the Gruyere cheese. Taste and adjust seasonings, then add salt to taste. Add rice mixture to the skillet and stir until onions are mixed well with the rice. (Alternatively, you can bake the casserole in a greased 10-inch baking pan.) Top with the rest of the Gruyere cheese and bake for 30 minutes uncovered or until brown and bubbling. Serve topped with cilantro, if you like.
(I put into 2 8x8 glass dished to bake)