Spaghetti Squash Pesto with Tomatoes

Bahan-bahan (4 porsi)

• 1 medium spaghetti squash
• 15 large basil leaves
• 1 small clove garlic
• 1/4 cup olive oil
• 3 tbsp Parmigiano-Reggiano (grated, plus more for topping)
• kosher salt and fresh pepper (to taste)
• 1 medium tomato (diced)