01 -
Set your oven to 375°F (190°C) and get a baking sheet ready by covering it with parchment paper. This'll save cleanup time later.
02 -
Scoop out the seeds and center from each zucchini half, leaving enough flesh (around 1/4 inch thick) to hold your filling.
03 -
Warm up olive oil over medium heat in a skillet. Toss in minced garlic and the diced onion. Let them cook together for about 2 minutes until the aroma hits you and onions start looking clear.
04 -
Stir in mushrooms and let them cook until soft and no longer watery, about 3-4 minutes. Spinach goes in next—cook just until it shrinks down, which'll take another couple minutes.
05 -
After taking the skillet off the heat, fold in your ricotta, grated Parmesan, and red pepper flakes (if using). Adjust the salt and pepper to get the flavor you like.
06 -
Carefully load up each zucchini half with the cheesy mixture. Arrange them on the parchment-lined baking sheet. Bake for 20-25 minutes—use a fork to check that the zucchini is nice and tender.
07 -
When ready, pull the tray out and let the zucchini cool briefly. Add fresh-cut basil over the top. Serve while it's still warm.