Creamy Rigatoni with Lemony Greens - The Scramble

Ingredients

• 16 oz. whole wheat rigatoni (use wheat/gluten-free, if needed)
• 2 Tbsp. extra virgin olive oil
• 1 red onion (halved top to bottom and sliced)
• 4 cloves garlic (minced, about 2 tsp.)
• 1/2 tsp. crushed red pepper flakes
• 12 oz. baby spinach (or use sliced Swiss chard or kale (stemmed if using chard or kale))
• 1 cup ricotta cheese
• 2 cups cherry or grape tomatoes (halved, or use 15 oz. canned diced tomatoes, drained)
• 1 lemon (use about 1 tsp. zest and 2 Tbsp. juice from half the lemon)
• 1/2 tsp. salt