Preheat oven to 450 degrees. Combine farro, stock concentrates, and 31/2 cups water (6 cups for 4 servings) in a medium pot. Bring to a boil and cook until farro is tender, 25-30 minutes total. TIP: If water evaporates before farro is done, add a splash more.

Meanwhile, wash and dry all produce. Trim zucchini, then slice into thin rounds. Cut tomato into 6 wedges. Halve and peel onion; cut one half into 1/2-inch wedges. Finely chop remaining half. Dice mozzarella into 1/2-inch pieces. Pick basil leaves from stems; discard stems. Finely chop half the leaves; tear remaining leaves into large pieces.

Place onion wedges in the center of a large piece of foil. Lift up and crimp sides of foil to make a bowl. Pour in half the vinegar (you’ll use the rest later) and a drizzle of olive oil. Season with salt and pepper. Place on one side of a baking sheet.

On opposite side of baking sheet, toss tomato and zucchini with a drizzle of olive oil, Italian Seasoning, salt, and pepper (use 2 baking sheets for 4 servings). Roast until tomato and zucchini are browned and onion wedges are softened, 15-20 minutes. Meanwhile, heat a small dry pan over medium-high heat. Add almonds and toast, stirring often, until fragrant and lightly browned, 3-4 minutes. Turn off heat; transfer to a small bowl.

In a second small bowl, whisk together remaining vinegar and a large drizzle of olive oil. Season with salt and pepper. Heat a drizzle of oil in same pan used to toast almonds over medium-high heat. Add chopped onion and cook until softened, 4-5 minutes. Season with salt and pepper.

Once farro is tender, drain any excess water and stir in cooked onion, chopped basil, half the mozzarella, and 1 TBSP butter (2 TBSP for 4 servings). Season with salt and pepper. Divide farro between bowls. Top with roasted veggies and remaining mozzarella. Drizzle with vinaigrette and sprinkle with almonds and torn basil.