Bring a medium pot of salted water to a boil. Wash and dry produce.

Trim ends from zucchini; shave zucchini lengthwise into thin ribbons using a peeler, rotating as you go, until you get to the seedy core. Finely chop core.

Dice tomato. Trim and thinly slice scallions, separating whites from greens. Zest and quarter lemon.

Open package of chicken and drain off any excess liquid. Heat a drizzle of oil in a large pan over medium-high heat. Add chicken in a single layer; season with salt and pepper. Cook, stirring occasionally, until browned and cooked through, 4-6 minutes. Transfer to a plate; wipe out pan. 

Once water is boiling, gently add ravioli to pot. Immediately reduce to a low simmer. Cook, stirring occasionally, until al dente and floating to the top, 4-5 minutes.

Reserve 1 cup pasta cooking water, then drain. TIP: Gently shake strainer with ravioli in it to remove as much moisture as possible.

Use pan used for chicken. 

Meanwhile, heat a large drizzle of olive oil in a large pan over medium-high heat. Add chopped zucchini, tomato, scallion whites, and 1 tsp Italian Seasoning (2 tsp for 4 servings; use the rest of the Italian Seasoning as you like). Cook until veggies are just softened, 1-2 minutes. Season with salt and pepper.

Reduce heat under pan with veggies to medium, then stir in stock concentrate, ¼ cup reserved pasta cooking water (⅓ cup for 4 servings), and a squeeze of lemon juice. Reduce heat to low and cook, 1-2 minutes.

Stir in sour cream and 1 TBSP butter (2 TBSP for 4) until melted and combined. Season with salt and pepper. TIP: If needed, stir in more reserved cooking water a splash at a time until sauce reaches a creamy consistency.

Separate zucchini ribbons with your hands, then stir into pan with sauce.

Gently stir in drained ravioli. Simmer until sauce has thickened, 1-2 minutes. Season with salt and pepper. Stir in lemon zest to taste.

Stir in chicken along with drained ravioli. 

Divide pasta between bowls. Garnish with scallion greens and Parmesan. Serve with remaining lemon wedges on the side.