Place the chicken, salt and pepper, onion, garlic, rosemary, thyme, broth, potato, and carrots into your crockpot. Cook on high for 3 hours.
Shred the chicken with 2 forks in the crockpot.
Whisk the flour and cream together until smooth. Add to the crockpot. Keep on high heat for another hour check the consistency. If it too thin whisk 3 tablespoons of cornstarch with some cold water and add to the soup. Cook until thickens.
A few minutes before you are serving it add your peas and continue coming for a few minutes until the peas are cooked.
Preheat oven to 400 degrees.
Line a sheet pan with parchment paper.
Lightly dust a cutting board with some flour. Unfold puff pastry and using cookie cutter cut in to desired shapes.
Place on prepared baking sheet. Whisk 1 egg with a little cream and brush the tops of the puff pastry shapes. Sprinkle with some flaky salt.
Bake for 8-10 minutes or until golden brown.
Ladle into bowls and top with puff pastry croutons.
