Asparagus Pasta Salad with Italian Dressing

INGREDIENTS

1/3 cup

red wine vinegar

2 tsp

freshly squeezed lemon juice

1 1/2 tsp

minced garlic

1 tsp

sugar

2 tsp

dried oregano

1/2 tsp

crushed red pepper flakes, or more to taste (optional)

1/2 cup

extra-virgin olive oil

1 lb

asparagus

2 1/2 cups

uncooked pasta, such as penne or rotini

2/3 cup

sliced red onions

1 1/2 cups

diced tomatoes

2/3 cup

shredded Parmesan cheese, for serving