Abstract: As renewable penetration increases, conventional microgrid black-start schemes show limited robustness to uncertainty. To reduce reliance on fuel-fired units and increase renewable participation during restoration, we propose a coordinated strategy using a diesel generator and a grid-forming energy storage system (GFM ESS), with the GFM ESS furnishing voltage-frequency support. Each source self-starts and energizes critical loads to form two subsystems; once stabilized, the diesel is assigned as the main reference, and the subsystems are paralleled via pre-synchronization, mode switching, and power-setpoint memorization. Subsequently, PV units are synchronized to the main reference, and power sharing and load allocation are progressively coordinated to complete system restoration. MATLAB/Simulink modeling and simulations demonstrate the feasibility and effectiveness of the proposed method.