Quick Spinach & Tomato Pasta

1 lb whole-wheat pasta
1 onion, sliced
1 tablespoon extra-virgin olive oil
1 - 14 oz can tomatoes, drained
1 lb frozen spinach
Salt & Pepper
1/3 cup crumbled feta cheese

Directions:
Cook pasta in a large pot of boiling salted water until al dente, according to package directions.
Meanwhile, heat oil in a large skillet over medium-high heat and saute onion. Add tomatoes; simmer for 10 minutes. Stir in spinach; heat through. Drain the pasta, toss with sauce and season with salt & pepper. Top with feta.

Reviews:
This is a good recipe. We served it with fish and it made a good meal. This is a good recipe for a party and fairly low calories. About 352 calories.