Bistro Moncur Potato & Mussel Salad

• 8 leaves basil
• 2 tomatoes
• 1 1/4 kg mussels in the shell
• 1 clove garlic
• 325 gr pink eye potatoes
• 200 ml virgin olive oil
• 34 gr black olives
• 40 ml wine vinegar (white)
• 1 gr saffron stamens
• 1 slice head fennel