Heat olive oil in a large skillet over medium-high heat.
Season chicken with paprika, Italian seasoning, salt, and pepper.
Cook chicken 5–6 minutes until browned and cooked through, then remove from pan.
Add garlic to skillet and sauté 30 seconds.
Add zucchini, bell pepper, and broccoli and cook 4–5 minutes until tender-crisp.
Stir in cherry tomatoes and cook 1–2 minutes.
Return chicken to skillet and drizzle with lemon juice.
Toss everything together and cook 2 minutes more.
Garnish with parsley and serve warm.