Preheat oven to 400℉ and prepare greens: Fill large pot ¾ full of water. Add pinch of salt and place over high heat until boiling.
Add spinach leaves to water and boil 3 min. While leaves are boiling, heat olive oil in sauté pan over medium. When greens are 1 min from being done boiling, add garlic and pepper to sauté pan.
Carefully transfer greens to sauté pan using a slotted spoon or sieve. Add salt, pepper, and garlic powder, and toss with tongs to coat. Cook 2-3 minutes. Turn off heat and set side to reheat just before serving.
Prepare roasted tomatoes: Place tomatoes on baking tray and drizzle olive oil over top. Sprinkle with salt, pepper, and garlic powder. Toss to coat evenly. Bake 15-20 min until skins are wrinkled and tomatoes begin to brown.
While tomatoes are roasting, prepare polenta: Add all polenta ingredients except goat cheese to large microwave safe glass bowl. Whisk to blend and microwave 4 min. Whisk to prevent lumps. Microwave additional 2 min. Whisk in goat cheese and cook 1-2 more min.
To serve: For each bowl, place ¼ grits in bottom of a pasta bowl. Top with ¼ tomatoes followed by ¼ greens. Drizzle 1 teaspoon balsamic vinegar and ¼ teaspoon olive oil. Sprinkle with 1 Tablespoon pine nuts and 1 Tablespoon microgreens.