Green Garlic Custard

Name: Green Garlic Custard
Ingredients: 50g Good quality unsalted butter, such as Plugra; 150g Green garlic, sliced thin; 500g Vegetable stock; Shiro dashi; Sea salt; 480g Green garlic broth, at 155F; 3 Whole large eggs; 100g Junmai ginjo sake; 150g Rice wine vinegar; 70g Sugar; 150g Cold water; 30g White soy sauce; 20g Dark soy sauce; 10g Shaved bonito flake; 15g Konbu seaweed; 1g AO Nori (Available from specialty Japanese markets); 1g Dried sea lettuce (Available along the coast of CA); 4 Broccoli heads; Grapeseed oil for frying; Salt; 6Broccoli stems, peeled and diced; Rice wine vinegar, to cover; Bottarga (Cured Mullet Roe) for shaving; Broccoli or Mustard Flowers