Turkey meatloaf - chinese grandma

Ingredients

• 1 cup chopped yellow onion (1 large)
• 1 tablespoon good olive oil
• 1/2 teaspoon kosher salt (or 1/4 teaspoon table salt)
• 1/4 teaspoon black pepper
• 1/3 teaspoon fresh thyme leaves (scant 1/4 teaspoon dried)
• 2 tablespoons Worcestershire sauce
• 1/4 cup chicken stock
• 1 teaspoon tomato paste
• 1 1/4 pounds ground turkey breast (93% lean)
• 1/2 cup plain dry bread crumbs
• 1 egg
• 1/4 cup ketchup