Melt 1 TBSP butter in a large pan over medium heat. Add shallot and cook, tossing, until soft, 2-3 minutes. Add 1 TBSP olive oil, mushrooms, tomatoes, and thyme to pan. Cook until very soft, 5-6 minutes. Toss in garlic and cook until fragrant, 30 seconds. Season with salt and pepper. Once quinoa is done, add to pan and toss to combine. Season with salt and pepper.