In a bowl, toss the shrimp with lime juice, 1 Tbsp. olive oil, chili powder, salt, pepper, paprika, & cumin. Set aside.
While shrimp is marinating, chop vegetables. Place red bell pepper & mushroom in one bowl; the remaining vegetables in another.
Heat a skillet over medium heat. Add remaining 1 Tbsp. of olive oil.
Sauté red pepper & mushroom for 3-5 minutes.
Add zucchini, squash, and red onion. Sauté for another 3-5 minutes, until vegetables slightly tender.
Add shrimp (add marinade if you want it flavorful; drain and just add shrimp if you just want a little flavor). Sauté for approximately 2 minutes or until shrimp are heated through and vegetables are at desired tenderness.
Notes
You can easily double the shrimp in this recipe if you want more protein to vegetable ratio.