01 - Preheat your oven to 425°F (220°C). Line a large baking sheet with parchment paper for easy cleanup.
02 - In a bowl, toss the halved baby potatoes and trimmed green beans with olive oil, kosher salt, and black pepper. Spread them evenly in a single layer on one half of the prepared baking sheet.
03 - Place the finely crushed pretzel crumbs in a shallow dish. In a separate shallow dish, whisk together the two large eggs, 2 tablespoons of Dijon mustard, garlic powder, smoked paprika, and the 1/4 teaspoon of black pepper.
04 - Dip each portion of chicken breast first into the egg mixture, ensuring it's fully coated, then press into the pretzel crumbs, making sure the crumbs adhere thoroughly. Arrange the coated chicken breasts on the other half of the baking sheet alongside the vegetables.
05 - Bake for 25 to 30 minutes. The chicken should be golden brown and cooked through, reaching an internal temperature of 165°F (74°C), and the vegetables should be tender.
06 - While the chicken and vegetables are baking, combine the cherry preserves, 2 tablespoons of Dijon mustard, apple cider vinegar, lemon juice, and a pinch of salt in a small bowl. Whisk until well combined to create the cherry mustard sauce.
07 - Serve the pretzel-crusted chicken and roasted vegetables hot. Offer the prepared cherry mustard sauce on the side for dipping.