Wash the lettuce and pat dry it with a kitchen napkin. Assemble all the ingredients on your kitchen counter. Peel the orange skin and remove the membranes and seeds also as shown below. We need only the inside soft orange.

In a large mixing bowl, add lettuce, orange pieces, walnuts, garlic, onion and avocado then add olive oil and salt and mix it well gently. At the end add garlic and herbs seasoning powder and toss it again.