Sous Vide Spring Onions with Sunflower Seed Pesto

Ingredients

• 1 bunch large spring onions, trimmed and halved
• 1/2 cup (118 ml) plus 2 tbsp. (30 ml) extra virgin olive oil
• Salt and freshly ground black pepper
• 2 tbsp. (30 ml) sunflower seeds
• 2 cloves garlic, peeled
• 3 cups (710 ml) loosely packed fresh basil leaves
• 3 tbsp. (44 ml) grated Parmesan cheese
• 1 tsp (5 ml) freshly squeezed lemon juice