Preheat and prep: Set oven to 400°F. Line a sheet pan with parchment paper if desired.
Cook the quinoa: Rinse 1.5 cups quinoa in a fine-mesh strainer until water runs clear. Place in a medium pot with 2.25 cups chicken broth and a pinch of salt. Bring to a boil, reduce heat to low, cover, and simmer for exactly 14 minutes. Remove from heat and let sit covered for 5 minutes. Fluff with a fork.
Roast the sweet potatoes: Toss cubed sweet potatoes with 2 tbsp olive oil, 1 tsp cumin, 1 tsp smoked paprika, and a generous pinch of salt. Spread in a single layer on the prepared sheet pan. Roast for 25–30 minutes, flipping halfway, until fork-tender and edges are caramelized.
Make the crema: In a bowl or jar, combine 1 cup Greek yogurt, juice of 2 limes, 1 grated garlic clove, 1/2 cup chopped cilantro, and 1/4 tsp salt. Whisk until smooth. Taste and adjust lime or salt. Portion into small silicone cups for freezing separately.
Cook the chicken: Season 1.5 lbs chicken thighs with 1 tsp cumin, 1 tsp smoked paprika, 1/2 tsp garlic powder, and salt. Heat 1 tbsp oil in a large skillet over medium-high. Cook chicken 6–7 minutes per side until golden and cooked through (165°F internal). Let rest 5 minutes, then shred or chop.
Cool everything completely: Spread quinoa and sweet potatoes on separate sheet pans or large plates to cool for 15–20 minutes. This prevents ice crystals from forming during freezing.
Assemble the bowls: Divide cooled quinoa, sweet potatoes, black beans, and chicken evenly among 6 meal prep containers. Add a small container of crema to each. Snap lids on, label with date and contents, and refrigerate or freeze.