Before starting, wash and dry all produce.If you've opted to add chicken, preheat the oven to 450°F. Heat Guide for Step 4: 1/8 tsp (1/4 tsp) mild, 1/4 tsp (1/2 tsp) medium, 1/2 tsp (1 tsp) spicy and 1 tsp (2 tsp) extra-spicy! Add 10 cups water and 2 tsp salt to a large pot (use same for 4 ppl). Cover and bring to a boil over high heat.

Meanwhile, halve zucchini lengthwise, then cut into 1/4-inch half-moons. Core, then cut pepper into 1/2-inch pieces.Zest, then juice half the lemon (use same for 4 ppl). Cut remaining lemon into wedges. Peel, then mince or grate garlic. Thinly slice chili, removing seeds for less heat. (TIP: We suggest using gloves when prepping chilies!)

Add linguine to the boiling water. Cook, stirring occasionally, until tender, 10-12 min. Reserve 1/4 cup (1/2 cup) pasta water, then drain and return linguine to the same pot, off heat.

Heat a large non-stick pan over medium-high heat. When hot, add 1 tbsp (2 tbsp) oil, then zucchini and peppers. Season with garlic salt and pepper. Cook, stirring occasionally, until veggies are tender-crisp, 3-4 min. Add garlic and 1/2 tsp (1 tsp) chilis. (NOTE: Reference heat guide.) Cook, stirring often, until fragrant, 1-2 min.

Remove the pan with veggies from heat, then add spinach, pesto, cream, goat cheese, lemon zest and 1/2 tbsp (1 tbsp) lemon juice. Season with pepper, then stir until spinach wilts, 1-2 min. Set aside.

Add veggies and sauce, reserved pasta water, half the Parmesan and 2 tbsp (4 tbsp) butter to the pot with linguine. Season with salt and pepper, then toss to combine. Divide zucchini and lemon linguine between bowls. Sprinkle with remaining Parmesan. Squeeze a lemon wedge over top, if desired. Sprinkle with any remaining chilis, if desired.