French Green Salad With Basil Shiitake

• 1 butter lettuce
• 1 garlic clove
• 170 gr shiitake mushrooms
• 90 gr spinach leaves
• 65 ml oilve oil
• 7 ml lemon juice
• 8 gr basil leaves
• 2 ml oil
• 2 ml mustard
• 1 gr sea salt