Lemon Garlic Orzo

• 2 tbsp extra virgin olive oil
• 1 onion, finely diced
• 0.5 head broccoli, cut into small florettes
• 1 cup frozen green peas
• 2 cup vegetable stock
• 1.333 cup orzo/rissoni, uncooked
• 0.5 cup milk
• 1 cup parmesan, grated
• 1 lemon, juiced
• 1 cup parsley, finely chopped
• 2 garlic cloves, finely chopped