Easy Chicken without cream soup meat

1 Tbsp olive oil 1 tsp dried oregano 3/4 tsp ground cumin 1/2 tsp chili powder 2 cloves garlic 1 small onion or 1/2 large onion chopped 2 celery stalks,[...]

8 old el paso tostadas (from 4.5-oz package) 4 cups shredded Lettuce 1 (15 ounce) can progresso black beans , drained, rinsed 2 boneless skinless chicken[...]

8 old el paso tostadas (from 4.5-oz package) 4 cups shredded lettuce 1 (15 ounce) can progresso black beans , drained, rinsed 2 boneless skinless chicken[...]