In a medium pot, combine farro, stock concentrates, and 31/2 cups water. Bring to a boil and cook until tender, 30-35 minutes total. TIP: If water evaporates before farro is cooked, add a splash more.

Wash and dry all produce. Preheat oven to 450 degrees. Trim and discard bottom inch of asparagus. Cut off the fuzzy tips and set aside. Chop the stalks into 1/2-inch pieces. Thinly slice zucchini into rounds. Mince or grate garlic. Halve, peel, and finely dice onion. Zest, then halve lemon.

On a baking sheet, toss asparagus tips, zucchini, and a large drizzle of olive oil. Season generously with salt and pepper. Roast in oven until nicely browned, 15-20 minutes, tossing halfway through.

Meanwhile, heat a drizzle of olive oil in a large pan over medium-high heat. Add onion and cook until soft and translucent, 3-4 minutes, tossing frequently. Add garlic and cook until fragrant, another minute, tossing.

Stir asparagus stalk pieces into pot with farro about 5 minutes before farro is done (grains should be just shy of al dente). Drain asparagus and farro once both are tender. Add to pan with onion and garlic, then stir in juice of half a lemon, half the lemon zest, half the Parmesan, and 1 TBSP butter. Season with salt and pepper.

Divide farro mixture between bowls. Top with roasted zucchini and asparagus. Sprinkle with remaining lemon zest, walnuts, and remaining Parmesan