Cook the Spaghetti: Bring a large pot of salted water to a boil.

Add the spaghetti and cook until al dente according to the package instructions.

Drain and set aside.

Prepare the Broccoli and Onion Mixture: In a large skillet, heat olive oil and butter over medium heat.

Add the minced garlic and sauté for 3-4 minutes until fragrant.

Add the chopped onions and cook until translucent.

Add the broccoli florets and continue to cook over medium heat until tender.

Add the cherry tomatoes and chili pepper, cooking until the tomatoes begin to soften.

Pour in the vegetable broth and a splash of water, then season with salt and black pepper.

Simmer for a few minutes until the vegetables are cooked through and the flavors meld together.

Combine Pasta and Vegetables: Add the cooked spaghetti to the skillet with the vegetable mixture.

Toss everything together until well combined and heated through.

Stir in the chopped parsley.

Prepare the Sauce: In a small bowl, combine Greek yogurt or sour cream, ketchup, minced garlic, and chopped parsley.

Mix well until smooth.

Serve: Serve the pasta hot, topped with the prepared sauce.

Enjoy your meal!