In a small bowl combine honey, mustard, lemon juice, garlic powder, dried onion, mustard seeds, salt and pepper. Stir to mix together.
Use a pastry brush to coat both sides of chicken thighs with honey mustard marinade. Set aside remaining marinade.
Add olive oil to skillet and turn to a medium heat. Use tongs to transfer chicken thighs into pan.
Cook chicken thighs for 4 - 5 mins each side. Use tongs to flip.
When meat is fully cooked (no pink), turn off and remove from heat Note 4
Momentarily transfer cooked chicken thighs to a side plate
Stir cream into remaining honey mustard sauce and mix together well
Slice mushrooms finely
Add mushrooms to skillet, place cooked chicken thighs on top, pour over creamy honey mustard sauce
Place in oven and cook for 10 mins
Serve with boiled green beans and remaining honey mustard sauce from skillet Note 5