How do I convert C# linq comprehension syntax into a lambda syntax

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C#

Hello

I solved the problem by using the combination of both comprehension syntax and lambda syntax. I was wondering how can I write the following code completely in lambda syntax format (without using from etc.) since I feel like it is not a good practice to use both at the same time - please correct me if I am wrong.

Thank You

What I have tried:

public static IEnumerable<(string customerId, int orderId, DateTime orderDate)> Res()
        {
            List<Customer> customers = Customers.CustomerList;

            string region = "WA";

            IEnumerable<(string, int, DateTime)> res = (from c in customers
                                                       from o in c.Orders
                                                       where c.Region == region
                                                       select (c.CustomerId, o.OrderId, o.OrderDate)).Take(3);

            return res;


        }