Mustard Tarragon Chicken (rice optional)

MUSTARD TARRAGON CHICKEN

4 Tbsp. butter
4 Tbsp. olive oil (plus more if needed)
8 oz sliced mushrooms
1 green onion, chopped
1 lb chicken breasts, cubed
2 tsp. mustard
2 tsp. tarragon
Salt and pepper to taste
Optional: 2 c. cooked rice

Heat butter and olive oil on medium high in skillet. Saute mushrooms. When almost done, add green onions. Remove mushrooms and green onions from skillet (leave juices in pan). Add more oil to skillet if needed. Cook chicken. Remove chicken from skillet (leave juices). Stir mustard and tarragon into juices in skillet. Add to rest of ingredients (including rice, if using) and mix well.