Vibrant Cold Vegetable Terrine

• 10 cauliflower (frozen)
• 4 eggs
• 240 gr onions (frozen chopped)
• 150 gr belgian carrots until tender (frozen cooked)
• 80 gr mushrooms (frozen sliced)
• 80 gr bread crumbs (dried)
• 40 gr parmesan cheese (grated)
• 38 gr spinach (frozen chopped)
• 34 gr butter (unsalted)
• 30 ml vegetable oil