Ingredients

• 1/4 cup vegetable oil, divided

• 4 to 6 bone-in, skin on chicken thighs

• 1 teaspoon all-purpose seasoning, plus more as needed

• 1 large yellow onion, chopped

• 2 stalks celery, chopped

• 4 carrots, cut into bite-sized pieces

• 2 cloves garlic, chopped

• 1 cup mushrooms, cut into bite-sized pieces

• 1 cube chicken bouillon, or more to taste

• 2 teaspoons dried rosemary

• 1/4 cup all-purpose flour

• 1 (12 ounce) bag mixed frozen vegetables

• 4 cups chicken stock, or more as needed

• 1 cup heavy cream or half-and-half