Mix honey, rice vinegar, soy sauce, tomato paste, and pineapple juice in a bowl to make the sauce.
Combine cornstarch with water in a small bowl to create slurry; set aside.
Season shrimp with salt and pepper.
Heat 1 tbsp vegetable oil in a large skillet over medium-high heat. Stir-fry shrimp until pink and cooked through, about 3-4 minutes. Remove shrimp and set aside.
Add remaining oil to the same pan. Sauté bell pepper, zucchini, garlic, and ginger for 3-4 minutes until vegetables are tender-crisp.
Return shrimp to pan, stir in sauce and cornstarch slurry. Cook until sauce thickens and coats the shrimp, about 2-3 minutes.
Toss in pineapple chunks and cook for 1 minute more. Garnish with green onion and sesame seeds before serving.