While spaghetti squash is baking, drain the scallops, pat them dry, then set them aside.
Rinse tomatoes and prep shallots, parsley, & garlic.
Heat 4 tablespoon avocado oil to a large skillet over medium heat. Cook shallots ~3 minutes with garlic for the last 30 seconds (until fragrant).
Pour in wine and reduce to half the liquid.
Add tomatoes and salt & pepper, smashing with a spatula every couple of minutes until desired consistency (~8 min).
Turn heat to low and add mozzarella, capers, & parsley until cheese is slightly melted (~2-4 min). Don't overcook the mozz or you'll have a sticky mess in the pan! Transfer sauce to a bowl.
Heat 2 tablespoon avocado oil on high in the skillet. Once hot add scallops in a single layer and cook for 2-3 min. Flip for 1-2 more and cut heat.
Add tomato sauce to scallops then serve over shredded spaghetti squash.