Before starting, preheat the oven to 450°F. Wash and dry all produce. Halve Brussels sprouts. Peel, then cut carrot into 1/4-inch rounds. Cut potatoes into 1/2-inch pieces. Peel, then cut shallot into 1/2-inch slices. Peel, then mince or grate garlic. Strip 1 tbsp thyme leaves (dbl for 4 ppl) from stems, then finely chop.

Toss potatoes, Brussels sprouts, carrots, half the shallots, half the garlic, half the thyme and 1 tbsp oil (dbl for 4 ppl) on a baking sheet. Arrange evenly into a single layer. Sprinkle over half the garlic salt and season with pepper. Roast in the middle of the oven, stirring halfway through cooking, until golden-brown, 22-24 min. (NOTE: In Step 4, stir veggies again before adding chicken.)

While veggies roast, pat chicken dry with paper towels. Add chicken, remaining thyme, remaining garlic salt and 1/2 tbsp oil (dbl for 4 ppl) to a large bowl. Season with pepper and toss to coat. Heat a large non-stick pan over medium-high heat. When hot, add 1/2 tbsp oil (dbl for 4 ppl), then chicken. Cook, until golden-brown, 2-3 min per side.

Remove the pan from heat. Transfer chicken to the baking sheet, on top of veggies. Roast in middle of oven, until chicken is cooked through, 10-12 min.**

While veggies and chicken roast, heat the same pan (from step 3) over medium heat. When hot, add 1 tbsp butter (dbl for 4 ppl), then remaining shallots and remaining garlic. Cook, stirring often, until shallots soften, 2-3 min. Sprinkle the flour over the shallots and cook for 1-2 min. Add 1/2 cup water (dbl for 4 ppl) and broth concentrate. Cook, stirring often, until gravy slightly thickens, 4-5 min. Remove pan from heat, then stir in sour cream.

Divide chicken and veggies between plates. Spoon over pan gravy.