Divide spinach amongst 2 serving bowls, add rows of tomatoes, pistachios and goat cheese
Heat olive oil in a small saucepan on low to medium heat.
Add scallions and cook for approximately 2 minutes until softened, swirling the pan occasionally.
Add the OJ, vinegar, sweetener and pepper. Let simmer for a few minutes until thoroughly heated.
Pour dressing over the salads and enjoy.
If making only one serving, refrigerate remaining dressing to save for later.