Best Tomato Butter Roast Chicken Recipe - How to Make Roast Chicken

Ingredients

• 1 tsp. ground cumin
• 1 tsp. ground mustard
• 1/4 tsp. cayenne pepper
• 1 tbsp. plus 1 tsp. kosher salt, divided, plus more
• Freshly ground black pepper
• 1 (3 1/2- to 4-lb.) whole chicken
• 1 1/2 lb. baby Yukon potatoes, quartered
• 2 large leeks, white and light green parts sliced into 1/2" rounds
• 1 tbsp. extra-virgin olive oil
• 1/2 c. (1 stick) unsalted butter, melted
• 1/4 c. tomato paste
• 1 tbsp. fresh thyme leaves