Heat a large nonstick skillet over medium heat. Spray lightly with olive oil spray and add 1 clove of minced garlic and cauliflower rice.
Cook for 4-5 minutes, stirring occasionally, until tender. Season with salt and pepper and stir in 1 tablespoon of fresh parsley. Transfer to serving plates and set aside.
In the same skillet, melt the light butter and olive oil over medium heat. Add the remaining minced garlic and cook for 30 seconds until fragrant.
Season shrimp with salt, pepper, and red pepper flakes. Add to the skillet in a single layer and cook for 1-2 minutes per side until pink and opaque. Remove shrimp and set aside.
Add chicken broth and lemon juice to the skillet, scraping up any browned bits. Let simmer for 2-3 minutes to reduce slightly.
Return the shrimp to the pan and toss in the lemon-garlic sauce. Sprinkle with the remaining fresh parsley and toss again to coat evenly.
Spoon the shrimp and sauce over cauliflower rice. Garnish with lemon wedges.