Preheat oven to 375 degrees F. Generously grease a 9 x 13-inch deep sided baking dish.
To make the rice, follow package instructions, subbing homemade vegetable broth for water, or bring 1 3/4 cups homemade stock to a boil and stir in 1 cup wild rice or wild rice blend, bring back up to a boil, then stir, cover, and turn heat down to a gentle simmer. Cook 45 - 50 minutes or until rice is al dente and the liquid is absorbed. Fluff and set aside to cool uncovered.
Meanwhile, arrange cornbread cubes on 1 - 2 large baking sheets. Slide into oven and toast 20 - 25 minutes or until cubes are crisp and golden, turning cubes halfway through. Lower heat to 350 degrees F.
To make stuffing, set a medium-sized skillet over medium heat. Heat olive oil and then add onion, celery, sea salt, and pepper. Sauté, stirring often, until vegetables are tender and translucent, about 10 minutes. Remove skillet from heat.
Note*: the linked vegan cornbread recipe contains a gluten-free option. If you don’t need a vegan recipe but do want a gluten-free one, I’m very partial to Ronni Lundy’s all-cornmeal, southern cornbread. I haven’t tried it, but Ronni Lundy’s recipe would probably work with vegan butter, flax eggs, and plant-based milk.