Sprinkle salt into a large bowl. Add crushed garlic and mash to a paste, using the back of a spoon. Combine honey, olive oil and lemon juice in a jar. Cover tightly and shake vigorously. Add honey mixture to garlic mixture; stir well. Cover and chill at least 2 hours. Remove stems from spinach; wash leaves thoroughly and pat dry. Tear leaves into bite-size pieces. Combine spinach, oranges and walnuts in a large bowl; toss well. Pour honey mixture over salad, tossing to coat. Serve immediately. Makes 4 to 6 servings.