Cheesy Chicken and wild rice casserole

Cheesy Chicken and Wild Rice Casserole via Picky Palate
3 T EVOO
1 med onion, finely diced
3 stalks celery, finely diced
3 carrots, peeled and diced
2 Tablespoons fresh minced garlic
2 C shredded, cooked chicken breast
2 C steamed white rice
16 oz prepared wild rice
1 teaspoon kosher salt
1/2 teaspoon black pepper
1/4 teaspoon garlic

cheese sauce
4 T butter
1/4 C flour
1/4 t kosher salt
1/4 tblack pepper
2 C chicken broth
2 C shredded cheddar

Top with 1 1/2 C shredded cheddar

350  F.  Heat oil in med pot over med heat.  Saute onion, celery and carrots til soft, 10 min.  Stir in garlic and cook 1 min.  Stir in chic, both rices, salt, pepper and garlic.  Reduce heat to low.

To prepare cheese sauce: melt butter in med pan over medhigh heat.  Whisk in flour, salt and pepper then slowly pour in broth whisking continuously.  Whisk til thick and nearly boiling then stir in cheese til melted.  Pour cheese sauce into cooked rice mix then transfer to a 9×13 dish. Top w additional cheddar and bake 25-30 min til cheese is melted through.