Rinse the hearts of palm pasta thoroughly in a colander and pat dry with paper towels.
Heat the extra virgin olive oil in a large skillet over medium heat.
Add the diced yellow onion and minced garlic to the skillet, sautéing until fragrant and translucent.
Add the ground turkey to the pan, breaking it into small crumbles with a spatula as it browns.
Season the turkey with sea salt, black pepper, and dried oregano, cooking until no longer pink.
Stir in the breadless crumbs and cook for 1 minute to allow them to toast slightly and coat the turkey.
Pour the marinara sauce into the skillet and bring to a gentle simmer.
Add the baby spinach and stir until the leaves are just wilted.
Fold in the prepared hearts of palm pasta, tossing everything together until the pasta is heated through and well-coated.
Transfer the mixture to a shallow bowl and serve immediately.