Cheesy BLT Pierogi Skillet Dinner

chopped sweet onion (from about half a medium onion)

slices turkey bacon, chopped (about 60 grams or 2 - 2 1/4 ounces total) (see note)

minced garlic

boxes frozen mini pierogies (no need to thaw), such as Mrs. T's Mini Classic Cheddar Pierogies

fat-fee, reduced-sodium chicken broth

reduced-fat cream cheese

reduced-fat shredded sharp cheddar cheese

baby spinach, chopped to yield about 4 1/2 cups

thinly sliced green onions

seeded, diced tomatoes (about 2 medium tomatoes)

optional dash of kosher salt, only if needed