Farro and Vegetable stir fry with chicken

Name: Farro and Vegetable stir fry with chicken
Ingredients: 1 pound Skinless/boneless chicken breasts or thighs, sliced; 3 cups Cooked farro; 12 ounces Cremini mushrooms; 1 Onion, thinly sliced; 1 bunch Asparagus, cut into 1 inch pieces on the diagonal; 1.5 cups Red cabbage; 1 cup Carrot, thinly sliced (I use a mandolin); 1 Leek, sliced and cleaned; 1 tablespoon Toasted sesame oil; 1 tablespoon Olive oil; 3 tablespoons Soy sauce; 1 tablespoon RIce wine vinegar (optional); Pepper, to taste; Sesame seeds, crushed cashews, or peanuts (optional); Thinly Sliced scallions (optional)