Chef Jordi Cruz, a judge on Spanish MasterChef, identifies four critical mistakes that many make when boiling pasta, which can lead to unsatisfactory results. He emphasizes the importance of using plenty of water, recommending a ratio of 100 grams of pasta per litre of water. Additionally, Cruz insists on the necessity of salting the water correctly, suggesting about 100 grams of salt for eight litres. He warns against adding oil, stating that it causes sauces to slide off the pasta, preventing flavor absorption. Furthermore, he advises against flavoring the boiling water with garlic or herbs, as this detracts from the pasta's own taste. These guidelines are applicable to all pasta varieties, including whole-wheat and gluten-free options. Cruz also shares a humorous anecdote about Microsoft co-founder Bill Gates, who once rented his restaurant for a private event but only ordered a Diet Coke.