Instant Pot Spaghetti Squash Primavera

Place spaghetti squash, cut-sides down, on a steaming rack inside a multi-functional pressure cooker (such as Instant Pot). Add water. Close and lock the lid. Select high pressure according to manufacturer's instructions; set timer for 7 minutes. Allow 10 to 15 minutes for pressure to build.

Release pressure carefully using the quick-release method according to manufacturer's instructions, about 5 minutes. Unlock and remove the lid. Transfer squash to a plate and scrape flesh into spaghetti strands with a fork. Empty, rinse, and dry pressure cooker pot.

Select Saute function. Add 2 tablespoons oil to the hot pot. Add onion, bell pepper, carrot, Italian seasoning, salt, and black pepper. Cook, stirring frequently, until onion is just tender, about 4 minutes. Add zucchini, tomatoes, garlic, lemon juice, and lemon zest; saute until zucchini is tender-crisp, about 5 minutes.

Add cooked spaghetti squash strands, basil, and parsley to the pot. Stir in remaining 1 tablespoon olive oil and saute until combined, about 2 minutes more.