Wash and dry all produce. Adjust rack to middle position and preheat oven to 425 degrees. Peel sweet potatoes, then cut into 1/2-inch cubes. Halve and peel onion, then cut into 1/2-inch wedges.

Toss sweet potatoes and onion on a baking sheet with a drizzle of olive oil and a pinch of salt and pepper. Roast in oven until tender and browned, about 25 minutes, tossing halfway through.

Halve tomatoes lengthwise. Finely chop cilantro; place 1 TBSP in a large bowl and set aside. Mince garlic until you have 1 tsp (you may have a clove left over). Halve lemon. Halve, pit, and peel avocado, then cut into small cubes. Mince chili, removing ribs and seeds first if you prefer less heat.

In a small bowl, combine remaining cilantro, 1/2 tsp cumin (we sent more), a pinch of minced garlic, and a pinch of chili (to taste). Stir in a squeeze of lemon and a large drizzle of olive oil. Season with salt, pepper, and more garlic and chili as desired. TIP: Add more lemon and olive oil as needed to give mixture a loose, drizzly consistency.

Take 4 oz (about half) of the grilling cheese and cut into 1/3-inch-thick slices (use the rest as you like). When sweet potatoes and onion are almost done, heat a drizzle of olive oil in a large pan over medium-high heat (use a nonstick pan if you have one). Add grilling cheese and cook until browned, 1-2 minutes per side.

Add tomatoes, sweet potatoes, onion, avocado, a squeeze of lemon, and a pinch of remaining chili (to taste) to bowl with reserved cilantro. Toss to combine. Divide between plates, then top with grilling cheese. Drizzle with chimichurri and serve.