Rim the ridge of your glass with a lime wedge and dip in a mix of margarita salt + sugar [I used about 3 tablespoons salt to 2 teaspoons sugar]. Fill the glass with ice. In a cocktail shaker, combine tequila, grand marnier, simple syrup and lime juice with ice, and shake for about 30 seconds. Pour over ice and squeeze in lime slices and add a few strawberries.
For strawberry simple syrup: combine equal parts sugar and water, bring to a boil and let sugar dissolve, then turn off heat and let cool completely. Combine 1 cup simply syrup + 1 1/2 cups slices strawberries in a blender and blend until combined. I don’t mind strawberry seeds, but if you’d like you can strain the mixture over a fine mesh strainer to remove the seeds.
This recipe can be easily doubled, quadrupled, etc. Since everyone’s tastes differ, add simple syrup 1/4 cup at a time and go from taste. I also suggest buying the lime juice if you plan on making a pitcher (or 2) considering you’d have to squeeze a billion limes to get enough juice.