In a medium bowl, whisk together the Dijon mustard, red wine vinegar, and lemon juice until fully combined.
Add the minced shallots, oregano, thyme, garlic powder, salt, and pepper to the bowl.
Slowly drizzle in the olive oil while continuously whisking so the mixture emulsifies and thickens.
Whisk until the vinaigrette has a smooth, creamy appearance and everything looks well incorporated.
Taste, then adjust the seasonings or add an extra splash of vinegar or lemon juice if you want more tang.
Pour the vinaigrette into a jar or bottle, shake once more, and chill for at least 30 minutes before serving for best flavor.