Preheat your oven to 400°F.
Cut the spaghetti squash in half lengthwise, remove seeds, and drizzle with a bit of olive oil, salt, and pepper. Place cut-side down on a baking sheet and roast for about 30-35 minutes until tender.
While the squash roasts, gently clean the oyster mushrooms and pat dry. In a bowl, toss the mushrooms with almond flour, minced garlic, chopped fresh herbs, salt, and pepper.
Heat a non-stick skillet over medium-high heat and add a little olive oil. Sauté the coated mushrooms until they become golden and crispy on the edges, about 5-7 minutes.
Dice the tempeh into bite-sized cubes. In the same skillet, add the tempeh cubes and sauté until they are browned and crispy, around 4-5 minutes.
For the creamy herb sauce, blend the cannellini beans with a clove of garlic, a few fresh herbs, a squeeze of lemon (if desired), and a pinch of salt until smooth.
Using a fork, scrape the roasted spaghetti squash to create strands. Arrange the squash strands on a plate, then top with the crispy garlic herb oyster mushrooms and sautéed tempeh.
Drizzle the white bean herb sauce over the top and garnish with additional fresh herbs as desired. Serve warm and enjoy the blend of textures and flavors.