Creamy chicken and tenderstem broccoli - Simply Veg

Ingredients

• 500g chicken breasts strips (or use 2 large chicken breasts, cut horizontally through the middle to make 4 thin pieces)
• Salt & pepper, to taste
• 3 tbsp flour (plus 1 extra tbsp for later, optional)
• 3-4 tbsp oil (olive or vegetable)
• 1 bunch tenderstem broccoli, ends trimmed and sliced in half lengthways
• ½ red onion, finely sliced
• Fresh thyme (about 3-4 sprigs), optional (or use 1 tsp dried Italian mixed herbs if you like)
• 1 tbsp Dijon mustard
• 500ml chicken stock
• 150g frozen peas
• 100ml single or double cream (double will thicken better, but use single if you prefer)