"So many layers of goodness!..."
extra-virgin olive oil
onion, chopped
cloves garlic, minced
ground beef
taco seasoning mix
Kosher salt
Freshly ground black pepper
(15.5-oz.) can black beans, 1/4 c. reserved
chopped cherry tomatoes, divided
corn, canned and drained or frozen
corn tortillas, 6 halved
shredded Monterey jack
shredded cheddar
crushed corn chips
green onions, thinly sliced
sour cream, for serving